Non-pressure infiltration preparing method for Ti3AlC2/Fe-based composite material

A composite material and infiltration technology, applied in the field of pressureless infiltration preparation

Active Publication Date: 2015-08-26
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has not been used to prepare Ti 3 AlC 2 Report on Fe-Based Composite Materials

Method used

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  • Non-pressure infiltration preparing method for Ti3AlC2/Fe-based composite material
  • Non-pressure infiltration preparing method for Ti3AlC2/Fe-based composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0019] Put a certain mass of Fe90 alloy powder into an alumina crucible, put it into a vacuum sintering furnace, and under the protection of argon, raise the furnace temperature to 1300°C at a heating rate of 20°C / min, keep it for 30 minutes, and then heat it up at 15°C / min. The temperature is lowered at a rate of min, and an Fe-based alloy ingot is obtained after cooling. Porous Ti with a porosity of 20% 3 AlC 2 The prefabricated body is placed in an alumina crucible, and a pre-fired iron alloy ingot is placed above it, heated to 1300°C in a high-temperature furnace at a heating rate of 20°C / min, kept for 2 hours, and then cooled at a rate of 5°C / min Cool down to 800°C, then cool down at a rate of 20°C / min, and get Ti after cooling 3 AlC 2 / Fe-based composites.

[0020] The above bicontinuous phase Ti 3 AlC 2 / Fe-based composite material, processed into a cylinder with a diameter of 6mm and a length of 10mm, was loaded on a universal testing machine at a rate of 0.25mm / ...

Embodiment approach 2

[0022] Put a certain mass of Fe90 alloy powder into an alumina crucible, put it into a vacuum sintering furnace, and under the protection of argon, raise the furnace temperature to 1400°C at a heating rate of 40°C / min, keep it for 10 minutes, and then heat it up at a temperature of 10°C / min. The temperature is lowered at a rate of min, and an Fe-based alloy ingot is obtained after cooling. Porous Ti with a porosity of 54% 3 AlC 2 The prefabricated body is placed in an alumina crucible, and a pre-fired iron alloy ingot is placed above it, heated to 1400°C in a high-temperature furnace at a heating rate of 30°C / min, kept for 0.5h, and then heated at a rate of 10°C / min The cooling rate is reduced to 800°C, and then the temperature is lowered at a rate of 30°C / min. After cooling, Ti 3 AlC 2 / Fe-based composites.

[0023] The above bicontinuous phase Ti 3 AlC 2 / Fe-based composite material, processed into a cylinder with a diameter of 6mm and a length of 10mm, was loaded on a...

Embodiment approach 3

[0025] Put a certain mass of Fe90 alloy powder into an alumina crucible, put it into a vacuum sintering furnace, and under the protection of argon, raise the furnace temperature to 1250°C at a heating rate of 30°C / min, keep it for 20 minutes, and then heat it up at 10°C / min. The temperature is lowered at a rate of min, and an Fe-based alloy ingot is obtained after cooling. Porous Ti with a porosity of 68% 3 AlC 2The prefabricated body is placed in an alumina crucible, and a pre-fired ferroalloy ingot is placed above it, heated to 1300°C at a heating rate of 10°C / min in a high-temperature furnace, kept for 4 hours, and then cooled at a rate of 5°C / min Cool down to 800°C, then cool down at a rate of 10°C / min, and obtain Ti after cooling 3 AlC 2 / Fe-based composites.

[0026] The above bicontinuous phase Ti 3 AlC 2 / Fe-based composite material, processed into a cylinder with a diameter of 6mm and a length of 10mm, was loaded on a universal testing machine at a rate of 0.25m...

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Abstract

The invention discloses a non-pressure infiltration preparing method for a Ti3AlC2 / Fe-based composite material. The volume content of Ti3AlC2 in the composite material prepared through the method is 20-80 vol percent, and the rest is Fe-based alloy. According to the microstructure of the composite material, the ceramic phase Ti3AlC2 and the metal phase Fe-based alloy are each continuously distributed in the three-dimensional space and are of a network crossed structure in the space, and the interface of the ceramic phase Ti3AlC2 and the interface of the Fe-based alloy are firmly combined. The non-pressure infiltration preparing method includes the following steps that Ti3AlC2 prefabricated bodies with different porosities are put into an alumina crucible, an iron alloy ingot fired in advance is put above the Ti3AlC2 prefabricated bodies, heating is conducted in a high-temperature furnace with the heating rate of 10-30 DEG C / min to reach the temperature of 1200-1400 DEG C, the temperature is kept for 0.5-4 h, cooling is conducted at the cooling rate of 5-10 DEG C / min to reach the temperature of 800 DEG C, cooling is then conducted at the rate of 10-30 DEG C / min, and the Ti3AlC2 / Fe-based composite material is obtained after cooling. The Ti3AlC2 / Fe-based composite material has the advantages of being high in strength, hardness, wear resistance and the like and can be widely applied to key devices in the fields of transportation, the military industry, machine manufacturing and the like.

Description

technical field [0001] The present invention relates to a kind of Ti 3 AlC 2 / Pressureless infiltration preparation method of Fe-based composites. Background technique [0002] Steel-based composite materials reinforced by one or several ceramic phases can improve the strength, wear resistance, corrosion resistance and high temperature resistance of traditional steel materials, and are widely used in machinery, chemical industry, metallurgy, transportation and other fields . For example, the use of ceramic-reinforced iron-based composite materials for rail transit materials such as turnouts and brake discs can improve their wear resistance and corrosion resistance; the use of ceramic-reinforced iron-based composite materials for structural materials in the nuclear energy field can improve their radiation resistance and High temperature resistance to meet the needs of various fission fast reactors and fusion reactors; the roll material in the metallurgical industry is made...

Claims

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Application Information

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IPC IPC(8): C22C33/04
Inventor 翟洪祥黄振莺陈霖陈路路位兴民周洋
Owner BEIJING JIAOTONG UNIV
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